diff --git a/home/darwin/core.nix b/home/darwin/core.nix
index b9035510..8632eeea 100644
--- a/home/darwin/core.nix
+++ b/home/darwin/core.nix
@@ -40,10 +40,5 @@
         # required to prevent sending default identity files first.
         IdentitiesOnly yes
     '';
-
-    # use ssh-agent so we only need to input passphrase once
-    # run `ssh-add /path/to/key` for every identity file
-    # check imported keys by `ssh-add -l`
-    # TODO `ssh-add` can only add keys temporary, use gnome-keyring to unlock all keys after login.
   };
 }
diff --git a/home/linux/desktop/ssh.nix b/home/linux/desktop/ssh.nix
index 00050d92..8ab5cd87 100644
--- a/home/linux/desktop/ssh.nix
+++ b/home/linux/desktop/ssh.nix
@@ -42,10 +42,5 @@
         HostName 192.168.5.174
         Port 22
     '';
-
-    # use ssh-agent so we only need to input passphrase once
-    # run `ssh-add /path/to/key` for every identity file
-    # check imported keys by `ssh-add -l`
-    # TODO `ssh-add` can only add keys temporary, use gnome-keyring to unlock all keys after login.
   };
 }